Tack-driver.



G. WILLERS.

TAGK DRIVER. n

APPLIOATION FILED JUNE Z8; 1911. 1,1%?983@ Patented Few', 1915.

cam. WILLEns., or cnrcaeo, ILLINoIs.v

TACK-DRIVER.

Specification of Letters Patent.

Patented Fei). e, 191,5.

Application med .nine 2s, 1911. vserial No'. 635,788.

T0 all whom t mai/ concern Be it known that I, CARL W1'r.LiiRs, a citizen of Sweden, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and vusei'ul Improvements in Tack-Drivers, of which the following is a specification.

My invention relates to drivers for tacks, nails, brads, pegs, etc., and has for its object improvements in devices of that character. l

In the accompanying drawings Figure 1 is in elevation; Fig. 2 is a vertical section; Fig. 3 is a similar section of the lower portion showing a nail or tack retained therein; and Figs. 4 and 5 are transverse sections of Fig. 2 on lines 4 4 and 5 5, respectively.

The casing consists of a cylindrical shell or tube 2, having a longitudinally perforated plug 7 secured in its lower end. The lower extremity of the shell 2 and theplug 7 are tapered as shown at 3 so as to reduce the diameter at the `point where the tacks are driven. Fitted into the shell or casing 2 is a reciprocating cylindrical hammer body 4 having, on its lower end, a magnetized projection 6 adapted to fit into and be guided by the perforation in the plug 7. Cn the upper end of the body 4 is secured a knurled head 5 which is preferably of the. same exterior diameter as that of the casing 2. The length of the parts is such that when the head 5 is in contact with the upper end oi" the casing 2, the lower end of the projection G will 'extend slightly beyond the lower end of the plug 7 as shown in Figs. l and 2.

Intermediate its ends, a portion of the hammer body 4 is milled away on one side, and in the recess so formed is located a spring 51. Thelower end of this spring is secured to the hammer body infany convenient manner, as by screw 71 illustrated in Fig. 2 by a portion of the hammer b odyheing broken away at 41. This spring is given an initial tension to cause the free end 61 to spring outward from the body 4, which outward movement is normally restrained by contact with the inner wall of the casing 2. Near the upper end of the casing 2 the inner wall is provided with an annular recess 31, and against the upper shoulder formed by this recess the free end 61 of the spring 51 impinges to limit the upward movement of the hammer. To permit the withdrawal of the hammer from the casing, a 'small hole .B`

is drilled through the casing just beneath Mthe upper shoulder of the recess 31, and through this hole a pin may be inserted to press back the free end 61so that it will clear the upper shoulder.-

As shown in Fig. 1 it will be observed that this driver is a plain cylinder body being slightly tapered at `one end, and has no external shoulders or projections to catch on external objects, and no externalv springs subject to damage. Also, that it has no external openings through fwhich dirt may 'get into the working parts except the small hole B. The locking spring d51 not only servesto prevent the accidental withdrawal of the hammer from its casing, but by reason of its initial tension it produces a frictionalw contact with the casing sufficient to retain the hammer in any position but not sullicient to interfere with the operation of the `the spring for limiting the movement of the hammer and the construction and arrangement being such that the spring may be released from the exterior of the shell.

3. In a tack driver, .the combination with a shell, of a. hammer within the shelland a f spring secured to the hammer, said shell having a recess 1n its interior surface arranged to coperate with the spring to limit the movement ofthe hammer with Jrespect to the shell and said recess being provided with an opening through which an instrument may be introduced to release the spring toseparate the shell and hammer.

4. In a tack driver, a cylindrical shell, a cylindrical tack-holding hammer designed to t and reciprocate within the shell, a. spring locking device securedto the hammer for engaging the shell tojlmt the' movement turen the presence of two subscribing Wit- Wth respect to each other, sald shell hemg nesses.

provided with an opening for' permittino' the release of thespring to Wlthdraw thi CARL VILLERS 5 hammer. Witnesses:

In testimony that I clalm the foregolng M. E. FLYNN,

as my own I have hereto axed my sgna- KARL PALM. 

